Jimenez's group develops microfluidic fluorescence-activated cell-sorting platforms to engineer and screen fluorescent proteins/biosensors, alongside ultrafast and single-molecule spectroscopy of biomolecular photophysics - bridging photophysics, instrumentation, and quantitative bioimaging probes. For context, this complements the established paradigm of NV-diamond ensemble magnetometry (Hahn-echo/DEER, nanoscale NMR, T1 relaxometry) operating near pT/√Hz sensitivity.